Window structure



Dec. 29, 1953 G. D. PETERSON WINDOW STRUCTURE 3 Sheets-Sheet l FiledJan. 28, 1948 Dec, 29, 1953 G. D. PETERSON WINDOW STRUCTURE 5Sheets-Sheet 2 Filed Jan. 28, 1948 f JNVENTOR. rd )gege/tina Dec. 29,1953 G. D. PETERSON WINDOW STRUCTURE 3 Sheets-Sheet 3 Filed Jan. 28,1948 VENTOR. 'efzg, Praza/5am Patented Dec. 29, 1953 UNITED STATES ATENTOFFICE WINDOW STRUCTURE Application January 28, 1948,-Serial No. 4,794

10 Claims.

This invention .relates to frames for windows, and particularly to aframe of the al1-metal type which may be joined together by mullionswhich extend the frames to cover any desired length of opening.

It has been the practice heretofore in the art to employ two or morewindows to cover an elongated opening in a building and provide amullion as a separate element to join the windows together.

The present invention substitutes for the adjacent sides of the frame,strip-s which may be joined together hby an expansion joint so that thewindow frames become a unit extension of each other when filling thewindow cost of the plurality of frames when so joined together is lesslthan the two complete window frames joined by the separate mullion,Further, the mullion employed for joining 'the present frames is notmuch larger itself, so that the inullion disposed between the frame isnot as noticeable as the cumbersome mullion separating the two completewindow frames.

A part of each window frame has a Xed window pane therein, while anadjacent part has a horizontally movable sash containing a window panewhich is sealed to the frame when in closed position by suitableweatherstrips. Rollers are provided on the movable sash which engage atrack on the sill portion of the frame to eliminate friction during thesliding operation. A space is provided above the sliding window vin thevheader structure which permits the movable sash to be raised and movedinwardly at the bottorn with respect to a building in which installedover the track so that it may be removed from the frame. With thisarrangement, .the Windows may be readily washed on the inside andoutside from the inside of the building.

The sections oi the frame are s0 formed @S to interlock with each other,,and screws are provided for joining the frame sections at the cornersso that the entire yframe may be .shipped in knocked-down condition,occupying very little space. Sealing i -ements are employed on thewindow frame and on the sliding sash so as to completely seal thesliding window in closed posi mail be employed for retain.. ing thepanes in position in the frame or spring strips may be utilized 4forholding the window pane within .the frame. The vtrarne is so constructedas to support a single thickness of glass, or two thicknesses of glassor a Thermopane type window glass may be mounted .directly into opening.The

than the frame section a description ,taken in conjunction Corporation,Detroit,

Z. the .fra-me. A screen or a storm window may be mounted in the openingclosed by the sliding window so that the opening may be closed by ascreen in summer or by a storm window in the winter,

Anchors are provided which dovetail into the different sections of thewindow frame by which the frame is secured in the opening when theanchors are nailed to the building. The adjoining sections of the frameare so formed that `the mullion resulting holds the two frame sectionstogether in movable relation to adjust themselves for expansion andcontraction of the frames,

Accordingly, the main objects of the invention are: to provide a windowmade of sections of ,a metal which are securable together to form theheader, `sill and lamb sections which are releasa-bly secured togetherat the corners by screws; to provide a metal frame for a Window having avertical bar dividing the area into two portions, in one of Which awindow pane is xed in position and in the other of which a horizontallymovable sash containing a window pane is mounted; to provide adjacentjamb edges on a window frame which are interconnectable to form amullion which provides an expansion joint between the separate,adjoining window frames; to provide anchors for a Window frame which arereleasably locked thereto for supporting the frame in the openingof abuilding; to provide spring strips for lretaining `one or a pair ofwindow Panes in the window openings of the frame; to provide 'a sillVentilating section which may be applied to the opening in the frame,covered Vby the IllGVi-tble Sash, on which ,a storm window may root thewntertime; and, in general, to provide a fraglne for a `window which issimple in construef tion, economical of manufacture and which vmay bemounted in extension of each other to lill any elcsiredoponins,

@thor objects and features oi novelty of the invention will bespecifically Apointed outl or will become alii-parent when referring,for a bet-ter understanding of the invention, to the following with theaccompanying drawings, wherein;

Figure l iis an elevational view from l.the exte rior of two Windowframes in mullion arrangement embodying features of this invention;

Fig. 2 is an enlarged broken sectional view of .the struc-tureillustrated in Fig. 1, taken on the .line -Eefz Athereof z Fig. is anenlarged broken sectional view of the .structure,illustrated `in Fig. l,taken on the line @es thereof:

Fig. e is an enlarged broken sectional. view ci the structureillustrated in Fig. l, taken on the line @we thereof;

Fig. 5 is an enlarged view of the structure illustrated in Fig. 1 withinthe circle e thereof when the sash is inoved to completely openposition;

Fig. is a vertical sectional view of the struc ture illustrated in Fig.1, as viewed within the circle 'ef thereof;

Fig. *i is an enlarged sectional view of the structure illustrated inFig. i, taken on the line 'i-l thereof;

Fig. 8 is an enlarged exploded view of the header, nountin, Sill andjamb sections of the window frame illustrated in Fig. 1;

lfiig. 9 is an exploded view of a head `and sill and janio element ofthe Sash which slides within the window freine, with parts broken away,and

Fig. 1G is a sectional riew of a sill ventilator employed in the traineopening.

Referring to Fig. l, a window assembly of the present invention isillustrated, wherein a pair of frames is disposed in an opening, forminga mullion therebetween. Each traine comprises a header' section le, asill section i i, jamie sections i2 and a mullion iarnb .sectionv Withineach frame, xed window panels it are snpported in oset relation withwindow sash assemblies i5 which may to the left or right in overlappingrelation to the lined panes ifi, thereby naving the window assemblies lemove to open position.

It is to he understood that any number ci the individual windows may besecured to each other to illl any length oi opening by utilizing themuln lion jarnh sections i3 along the mating edges of each window frame.The window sections iii, which slide horizontally, are supported on atrack projecting upwardly from the window sill eetion il and engaged byrollers on the lower edge of the sections to assure ease of movement ofthe sections. A weatherstrip of the pile type is supported on the sashi5 about the tracl; so as to seal the window at the bottom, and similarsealing strips are employed at the top of the movable sash section onboth the inner and outer sides thereof in contact with the headersections is. The stile sections of the movable sash have similar sealingstrips projecting outwardly of the sash in engagement with the windowframe sections when in completely open or completely closed position. Anadditional sealing strip is supported on the frame meeting rail betweenthe movable and xed window pane assemelles to be in lateral abuttingrelation with the weather-strip on the sash when in closed position.This abutting also obtains when the window sash has been shifted tocompletely open position.

Referring to Fig. 3, the header section lil embodies a header bar havinga web il having a downwardly extending portion iE and an in wardlysloping web portion i9. A dovetailed recess 2! is located at thejunction between the web il and portion iB. A downwardly projectingnange 22 is provided on the opposite end of the web from the portion it,and a similar downwardly directed flange 23 entends from the end or theweh i9. A dovetailed recess 2i is provided on the outer surface of theweb I'l adjecent to the dovetailed slot 2l. This latter dovetail 2!! isemployed to receive and be secured by a head anchor 2e which is nailedor otherwise secured to the building structure 25. A dualpurpose innerheader and sill section 2 is joined Gil i $3 outwardly or" the irai/ne.

to the web El ci the header section is through the engagement of thedovetail 2S thereof in the dovetailed slot 2l of the portion i5. Theinner header and sill section is o U shape having an outer web 2e andinnerwel on the end of which the dovetail 2e mentioned above isprovided. The webs 29 and El are joined by a base web t2 havingdownwardly' presented spaced slots 33 and 3d therein. The web 2S extendsdownwardly at 35 below the base web 32.

The side jamb sections of the raine l2 (Figure el) embody a channelsection 35 having a laterally extending weh 3l which is flanged outwardly on the end at A ridge on the cuter surface oi the weh f5? has anoutwardly facing slot fil. The web t? is disposed laterally ci a sideweb et of the channel element having joined thereto the hase web d3 ofchannel portion which is provided with a of spaced slots ed and @ilwhich are aligned with the slots and 3d, respectively, of the innerheader and sill section 2l. .an outer web t extends from the base web oithe channel portion parallel to the web l2 and is provided with anoffset portion il having a slot i3 therein aligned with the slot fl! inthe ridge S9 in the outer surface oi the web El. A ange lid extends fromthe offset portion il of the web ili. n. jamie anchor El has a webportion 52 engaged in the slots Ill and li9 from which a web i3 extendsin position to be secured to the frame elements of the huilding. Eyreversing the iarnh section oi the frame element l2 end for end, it maybe applied to either the right or lett-hand side of the window frame.

The wec of the iiange is extended at all below the oase web and this webis notched out at the top to receive the web (Figure S) and extendingange 35 of the inner header and sill section 2l. This orms the topcorners oi the frame which are held together by a pair of screwsextending through apertures and are threaded into a pair of apertures 5?in the web i2 of the channel portion of the jarnb section.

The sill section li comprises a sill bar having a web lis (Figures 2 and3) having on the end a downwardly extending flange and inwardlytherefrom a dange di. portion G2 extends upwardly from the web 5S andhas an inwardly extending web 63 which slopes upwardly and which isprovided with a track and an upwardly extending lip at the inner end.This lip collects the condensation 'from the windows and permits it toiiow down the slope of the web r'he trac?. ay has a slotted perdon tetherein which permit., apertures to be drilled therethrough to permitdrainage, and any hurrs that may he lei't in the hole need not beremoved because of th Lr location within the slot. The portion 62 of thesection is provided with a pair of dovetailed slots Si and Sii and aridge iorrns a dovetailed slot li. en anchoring element 25 engages thedovetailed slot 'il to anchor the sill in position in the buildingopening. A similar anchoring element 25 ma;1 also be utilized forengaging in the dovetailed slot 53 for anchoring the sill to thebuilding structure. The inner header and sill section 2'! is applied tothe flange of the sill oar through the engagement of the dovetail 2t inthe dovetaileol slot 5l'. The bottom portion or" the inner header andsill section El is employed only across the ixed window assembly ifi atthe sill and the end of the section mates in a notch where it abuts thejamb section i2. A pair of screws extends through the .apertures 15st1in the upwardly directed portieri If': of the .section `and threadedinto lapertures .El in ythe web :42 lof the iamb of the section I2 .forsecuring the sill Asection to the :a-mb section at the corner to whichthe sill section `2 "I extends.

`The opposite vend of the `section '2l at the corner of the sill .abutsagainst a frame meeting rail i2 (Figures 4 and 79, the lower end ofwhich has a laterally extending iiange "L3 ont away to 4provide a notchfor receiving the end of the section 21. As illustrated in Fig. 3,similar screws are utilized for extending through apertures .in theupwardly extending portion 6.2 .on the :sill :section :H and securedinthreaded apertures Yon the inner face of the frame meeting vrail '12.Spaced webs le .of the section 'I2 have outwardly directedspaced slots'I5 and TIB in .alignment Ywith the .slots 33 and 34 in the .innerheader and sill :section 21 and with slots di and 115 in `the jambsection I2. The section 'I2 .abuts against the web :I 7 of the headersection lil and is secured Yin position byscrews extending throughapertures 4in portion I8 vinto .threaded apertures provided inthe innerweb 'FI ofthe section. A'large dovetailed groove 'E8 is provided in :theface of the web 'I7 for receiving a weatherstrip i9 which .is retainedin `position thereby. Certain of lthe channel sections A3d ofthe jambsection .I2 may be provided ywith dovetailed grooves 4B 'for receiving-a weatherstrip i9 which is retained vin position thereby to abut-theweatherstripili when the movable sash .is 'in closed position.

The ends of the frame jamb section I2 which engage the sill 'section IIvat the point vadje-.cent vto the area of the sliding window whenclosed, at which the .sill section -27 is not utilized, are securedtogether by screws extending through apertures 56 in the upwardlyextending portion 62 into the threaded apertures c35'! in the web Vdi.of the jamb section. "It will be noted in this arrangement that thenotch 55 is omitted vbecause of the absence ofthe sill section 27 atthis point.

The sliding window l5 (Figures 4 and f90 has a vsliding sash 8i whichembodies two like stiles 32,

a top rail S3 and a bottom rail A34. The stiles are of tubular vfornihaving outer side faces 185, inner webs 86, a glass supporting web :87.and an Iouter web 8%. The glass supporting web 81 is provided withinwardly directed slots Bil and Ell which are spaced from each other,while the --web 88 has an extending iiange 92 which projects beyond :theweb '8l'. The outer Asurface of the web B8 is provided with .adovetailed groove 93 for supporting and securely holding :a 'sealin`-strip gli. The top rail B3 of 'the movable sash has a .central web sewith upwardly :directed 'flanges 19E at each end, the 4outer surface of'which `is provided with projections containing zdovetailed grooves Sl:for receiving the weatherstrip 94. A downwardly projecting iiange 93Eis :provided in alignment with the frange 5S on the front face of thetoprail.

`The bottom rail ad .comprises a central web .Se

having downwardly .projecting wall portions lill containing slots 'm2'for reducing `the weight of the section. ken :upwardly ,extending.harige les is provided atv the front of the'bottom rail'aligned withthe nan-ge 98 of the top :rail B3 and 92 of 4the stiles 82. The nange192 is cut .away on the sash stiles 82 vto provide .notches 2.55 forreceiving the ends of the tcp rail ,and-bottom rail to which they aresecured by screws LM extending through apertures lee in the web S5 ofthestile and threaded into apertures It@ in 'the webs :9.5

land `99 :of the rails 83 and Se, respectively. In this manner the sashis securely held together .at vthe four corners.

Rollers L01 have their .stub vshafts ies extending through .apertures inthe webs .85 and ,Se so as to be in alignment with the :track 6s of thesill section l I. 'The screws .IM are disposed on eachside 4otticoroller to assist in maintaining the roller in .alignment with the track.The shafts let are peenedin the aperture and the roller freely turns Ionthe shaft. A roller is vmounted in the lower end :of l.each of .thestiles t2 ,of the sash so that both ends ride upon the track Se.

A window .pane lil is mounted .against :the flange i3 of the framemeeting rail i2, ie flange 35 :on :the inner header and sill section il'and the .iiallge ,on the jamb section l2. The anges abovexnamed arecoplanar and directly receive the glass. lThe .glass is forced againstputty .or other :sealing lmaterial placed on the anges. Four glazingstrips I I2 form a coplanar retaining flange around the opening when`inserted in the aligned :slots in the inner header and sill section, inthe frame ymeeting rail lli and in the jarnb section I2. Thereafter,four spring elements H3 are slipped in between the glass iii and thestrips VH2 to urge the glass outwardly against the coplanar flanges..Spring tension in the strips retains the strips and glass in position.r`ihe window glass IIi is applied in the saine manner to the window sashl5, the pane first being placed against the 'flange s2 of the stiles andanges 88 and AI'Il3 .on the top and bottom rails et and tid. Thereafter,glazing strips H2 are placed in one set of slots to be lcoplanar withthe flanges above mentioned against which the glass is placed, after.which four of the spring lstrips Iii-i :are added Lbetween the flangesI lf2 land the window glass IM to .hold the glass in position.

Whenfit isdesired to join two windows together, they are assembled `inthe saine Ina-nner, with the :exception that a frame mullio'n jarnb H5{Figure 4l) `'replaces the standard frame jarnb I2 in lone oftheswindows. This Vrnullion jarnb has a channel `section Ils having anouter web `I i7 and an inner web H8 joined by a 'base web i9 containingspaced slots lil. The web lll at the end has an inwardly extendingflange 22 and also l'an offset projecting flange |23. The web II8 has aweb l2@ extending from the end inwardly `at right angles therefrom,which has on its inner end an enlarged portion 25 provided with a slot'26 'for `receiving -a strip it which overlaps the web '31 of the irarnejarn'b section I2, The flanges I2 2 and 23 mate with the flange 14S-andweb 4:6 ofthe frarne jarnb section I2 and `prevent the section f! tegfroni moving inwardly, while ithe :engagement of `the portion i2? or"the Aenlarged portion IE5 of the mullion section I3 prevents :thesection from moving outwardly. n leaf `spring 'H8 'is disposed betweenthe web Il and the flange V33 on the section iii to urge the webs 124and t1 away from each other but permitting vthem to move toward eachother in oase the "metal of the frames expands. When the metalcontracts, the spring maintains the engagejrnent of the web 3l with thestrip I i2.

`v5/'hilt it is within fthe purview of this invention .to use windowpanes which extend from the top to the bottom of the frame and sash,muntins .can Ybe employed therebetween for using .glass 4panes of`shorter .li-eight. A section of vthe 'muntin is illustrated in ewherein muntin .is the shape-oi an H hav-ing a central web `Isc and 2two parallel webs |3| disposed at right angles thereto and in T relationtherewith. This provides an upwardly and downwardly presented channel oneither side of the web |30 for the reception of the bottom of the toppane of glass and the top of the bottom pane of glass. It will be notedthat on the outside of the window the iange |3| is out away at the endat |32 for overlapping the projecting flange 92 on the sash stile S5.The muntin is secured in position by a screw projecting through theflanges 92 into the web |39, the heads of the screws being visible onthe outside of the frame, as illustrated in Fig. 1. Similarly, themuntin is secured to the jamb l2 and the frame meeting rail l2 by havingthe cutaway end portions |32 overlap the flange 54 on the jamb i2 andthe Iiange 'i3 on the frame meeting rail l2. Screws extend through thefianges S and 13 into the Web i3@ for securing the muntin to the windowframe for supporting e the xed window panes.

It will be noted when examining the window frame structure and themovable sash structure that the adjacent faces which support the windowpanes and lli?. have an additional set of slots 89, 1S, ete. parallel tobut spaced from the slots in which the glazing strips l2 are employedfor securing the panes in the frame, as illustrated. If Thermopane glassis to be employed embodying a pair of spaced window panes, these aremounted in the window opening and cover the slots now employed forholding a single pane. The supporting glazing strips are applied to theinnermost set of slots and putty alone is employed for holding theThermopane glass in position.

It is also within the purview of the present invention to apply a paneof glass against the strips |2 and employ another set of glazing stripsH2 in the innermost slots and utilize additional glazing springsl l 3for retaining the second glass against the glazing strips |52 to providedouble thicknesses of glass in the openings. The window glass could beof the removable type having a frame (Figure 4l) which can be set in the.7,

opening against the strips l I2 and retained in position through theapplication of another set of strips l i2 in the innermost slots. ln thesummer months these latter strips and window may be removed and stored.

It will be noted that the storm or frame window may be applied directlyto the outside anges 54 and 'J3 of the frame in the window opening asthe distance between the flange 'i3 and slot 'i5 of the frame meetingrail 12 is exactly the same as the distance between the face of thestrip ||2 and the slot t9 of the window sash stile. This is also true ofthe distance between the face of the strip |12 and the slot 45 of theframe jamb section I2. The same treatment may be applied to the linedwindow, to the movable sash, and also to the window opening through theframe.

Various means may be employed for locking the window sash in open andclosed positions. For the purpose of illustration, a pin |34 is shownhaving a handle |35 on one end and provided with a tubular sleevetherearound containing a spring which permits the handle to withdraw theplunger end |35 from an aperture in the frame meeting rail la when thewindow is in closed position.

When a storm window is placed in the frame, a sill ventilator ispreferably employed, as illustrated in Fig. l0, having an outer ange 38.A step |39 is provided at the top for receiving the upwardly presentingtrack, Jaz-:cb scc bottom of the storm window, the storm window beingheld in position at the sides and top. An inwardly extending flange fromthe step has a downwardly projecting web lili terminating in an inwardlydirected flange |1272 and a vertical web |53 which extends on each sideof the flange M2. Similarly, a downwardly extending flange N4 isprovided coplanar with the flange |43. Suitable apertures are providedin the outer flange |38 and web illI, the latter being covered by aslide |45 which may be shifted laterally by the handle |48 to uncoverone or a plurality of the apertures as may be desired. By the use ofthis ventilator, the window pane employed in the fixed window openingsmay also be employed in the opening of the movable sash since the step|35 is aligned with the base web 32 of the inner sill section 21. It isto be understood that in place of the storm window a screen may bemounted in the same manner within the opening of the movable sash.

It will be noted from Fig. 2 that a space |47 is provided above themovable sash between the header section which permits the movable sashto be lifted upwardly and to have the bottom of the sash clear the track64, as illustrated in Fig. 3, so that the sash may be pulled inwardlyfrom the bottom and thereby removed. Similarly, the sash may be firstinserted in the top, lifted upwardly and pushed in at the bottom toagain apply the sash to the track Sli. A sealing strip M8 is provided ina slot |49 which encompasses the track S4 for sealing the sash bottomrail thereabout.

Referring to Fig. 4, it will be noted that the jarnb anchor 5| isreversible so that the web 53 thereof may be disposed inwardly of theframe, as viewed in the figure, or outwardly thereof, as illustrated indot and dash line. in the position illustrated in unbroken line, theanchor is emploved with a brick veneer type of construction, while inframe types of buildings the web 53 of the anchor is usually in theposition illustrated in broken line. Similarly, the head or sill anchors25 may be employed at any point along the frame and in various spacedApositions relative to each other as the need may require,

Referring again to Fig. l, it will be noted that the left-hand andright-hand windows which go to make up the pair of windows joined by themullion have the movable sash reversed, that is to say, the sash is onthe left-hand side of the left-hand window and on the right-hand side ofthe right-hand window of the pair as viewed in the gure from the outsideof the building. It should be understood that the movable sash |5 may bedisposed on the left-hand or right-hand side of both of the windows, orboth of the sashes could be placed adjacent to each other, theconstruction of the present window readily lending itself to suchadaptation.

What is claimed is:

l. The combination with a window *frame having a head section cont,ining a downward- .ly presenting channel, a sill section l'savi c "njoining said sill and head sections to complete the frame, a meetingrail joining said head sill sections of the frame intermediate the iembsections thereof a horizontally slidable se said frame having a top-rail projectable w hin said channel of the head section of the frame, abottom rail for the sash having a channel in the bottom thereof forreceiving said 1 track. Stiles joining said top and bottom rails tocomplete the sash structure, vertical sealing. strips on the inner faceof one oi the jamb sections and the meeting rail of said'. frame, andvertical sealing strips on the outer faces 01" the Stiles of the sash solocated as to be in abutting cia tion with the vertical sealing stripsoi the traine' when the sash is in closed position.

2. The combination with a window franse having a head section containinga` downwardly presenting channel, a sill section having an npwardlypresenting track,- and jamb sections joining said sill and head sectionsto complete the frame, a meeting rail joining saidhead and sill sectionsoi the frame intermedi .te the lamb sections thereof a horizontally7slidable sash for said frame having a top rail projectable within saidchannel ofthe head section' of the trarne.. a bottom rail for the sashhaving a channel. in the bottom thereof for receiving said track,stil'es joining said top and bottom rails to completeV the sashstructure, vertical sealing strips on one' of the jarnb sections and onthe meeting rail' of said frame and verticalsealingV strips on` each. ofthe stiles of the sash, said vertical sealing strips being so locatedwith respect to the vertical sealing strips on said frame to be inweathersealing relationship therewith when said sash is in its closedposition.

3. The combination with a window frame having a head section containinga downwardly presenting channel, a, sill section having an npwardlypresenting track, and jamb sections joining said sill and head sectionsto complete the frame, a meeting rail joining' said head and sillsections of the frame intermediate the jamb sections thereof ahorizontally slide-ble sash: for' said frame having a top railpro'jectable within said channel or" the head section of the frame, abottom rail for the sash having a channel in the bottom thereof forreceiving said track, sti-les joining said top and bottom rails tocomplete the sash structure, said head and sill sections of said framebeing spaced apart a distance sufficiently greater than the spacing ofthe top and bottom rails of the sash that said sash can move upwardlyinto channel a distance suincient to permit it to be lifted ofi saidtrack; vertical sealing strips on one of the jamb sections and on themeeting rail of said frame and vertical sealing strips on the Stiles ofthe sash, said vertical sealing strips being so located with respect tothe vertical sealing strips on said frame as to be in weather sealingrelationship therewith when said sash is in its closed position.

4. The combination described in claim 3 including also a projectionextending downwardly from the web of said downwardly presenting channelfor preventing upward movement of said sash when said sash is in atleast a partially closed position.

5. A structure dened in claim 3 including also a xed sash within saidframe positioned out of the path of travel of said sliding sash andmounted between said frame head section and said frame sill section andbetween said meeting rail and one oi said ira-me jamb sections.

6. The combination defined in claim 2 wherein a stile of said slidablesash at least partially overlays, and is closedly engageable with saidmeeting rail when said slidable sash is in closed position.

7. The combination with a window frame having a head section containinga downward- 1y presenting channel near one edge thereof, a sill sectionhaving an upwardly presenting said downwardly presenting 10 track nearone edge thereof; and threel jamb sectionsv joining said. sill and hea-dsection. to complete the frame and denne two adjacent openings. offsetfrom said; track and channel, said. frame head, sill and jainb sectionsbeing adapted to retain a xed: window panel in one of said openings andto, removably retain a hired screenr panel. fio-planar with said windowpanel in. the other of' said. openings; a window panel in. said one cislidable sash for said frame having Aa top rail projectible within saidchannel oi" theA head section` of the frame, a bottom rail for the sashhaving a channel in the bottom thereof for reoeiving said. track, Stilesjoining said' top and bottom rails to complete the sash structure said;hcrizontaliy slidable sashv being froml a position in substantialregister with said one of said openings to a position in substantialregister with said other of said openings; verti-v call weather sealingmeans' en an adjacent two of said jarnb` sectionsand. vertical sealingmeans on the stiles of said sash, said last-named vertical sealing meansbeingv so located with respectto the verticalfsealing means on saidframe as to be in. weather sealing. relationship therewith when saidsash is in its closed position..

8.. The combination. with a Window frame having a head. sectioncontaining a downwardl-y presenting channel. near. one edge. there of, asill"` section. having an. upwardly presenty ingv track near oneedgethereoi", and three jamb sections joining said sill and headsection. to complete the traine and denne two adjacent openings offsetfrom said. track and channel, said frame head, sill and jan-ib sectionsbeing adapted to removably retain a window panel in one oi said openingsand. to removably retain` a nxed screen co-planar with said window panelin the other of said openings; window panel in said one of saidopenings; a horizontal'- ly slidable sash for said frame having a toprali projectible within said channel oi the head section of the frame, abottom rail for the sash having a channel in the bottom thereof forreceiving said track, stiles joining said topr and bottom railstocomplete the sash structure, said horizontally slidable sash beingmovable from a position in substantial register with said window panelto a position in substantial register' with the said other of saidopenings, vertical weather sealing means on an adjacent two or said jambsections and vertical sealing means on the stiles or said sash, saidlastunamed vertical sealing means being so located with respect to thevertical sealing means on said frame as to be in weather sealingrelationship therewith when said sash is in its closed position, saidsash being also in weather sealing relationship with said channel andwith said track whereby when said sash is in substantial register withthe portion of the frame surrounding said screen panel,

it Will be in weather sealing relationship with said frame around itsentire periphery.

9. The combination with a window frame havmg a head section containing adownwardly presenting channel near one edge thereof, a sill having anupwardly presenting track near one edge thereof, and three jamb sectionsjoining said sill and head section to complete the frame and denne twoadjacent openings oiiset from said track and channel, said frame head,sill and jamb a xed window panel in one of said openings and toremovably retain a fixed screen panel said openings; a horizontally'movable 11 coeplanar with said window `panel in the other' of saidopenings; a Window panel in said one of said openings; a horizontallyslidable sash for said frame having a top rail projectible within saidchannel of the head section of the frame, a bottom rail for the sashhaving a channel in the bottom thereof for receiving said track, stilesjoining said top and bottom rails to complete the sash structure, saidhorizontally slidable sash being movable from a position in substantialregister with said one of said openings to a position in substantialregister with said other of said openings, vertical sealing strips onone of the jamb sections and on the meeting rail of said frame andvertical sealing strips on the stiles of the sash, said vertical sealingstrips being so located with respect to the vertical sealing strips onsaid frame as to be in Weather sealing relationship therewith when saidsash is in register with said one of said openings.

10. A combination with a window frame having a head section containing adownwardly presenting channel near one edge thereof, a sill sectionhaving an upwardli7 presenting track near one edge thereof and threejanib sections joining said sill section and head section to cornpletethe frame and define two 'adjacent coplanar openings offset from saidtrack and channel, said frame head, sill and jainb sections beingadapted to retain a iixed window panel in one of said openings and toretain a xed screen panel in the other or" said openings; a horizontallyslidable sash for said frame having a top rail projectible Within saidchannel of the head section of the frame, a bottom rail for the sashhaving a channel in the bottom thereof for receiving said track, Stilesjoining said top and bottom rails to complete the sash structure, saidhorizontally slidable sash being movable from a position in substantialregister 12 with said one of said openings to a position in substantialregister with said other of said openings, vertical Weather sealingmeans on an adjacent two of said jamb sections and vertical sealingmeans on the stiles of said sash, said last-named vertical sealing meansbeing so located with respect to the vertical sealing means on saidframe as to be in weather sealing relationship therewith when said sashis in its closed position.

GERALD D. PETERSON.

References Cited in the rile of this patent UNITED STATES PATENTS NumberName Date 981,486 Shaner` Jan. l0, 1911 1,040,572 Otterson Oct. 8, 19121,519,087 Polachek Dec. 9, 1924 1,569,602 Anderson Jan. 12, 19261,596,450 Rappaport Aug. 17, 1926 1,763,489 Turner June l0, 19301,789,970 Dreher Jan. 27, 1931 1,805,538 Anderberg May 19, 19311,854,633 Stephens Apr. 19, 1932 1,869,274 Phillips July 26, 19321,922,286 Gronbech Aug. 15, 1933 1,955,124 Hamm Apr. 17, 1934 1,999,208Peremi et al. Apr. 30, 1935 2,060,525 Perenii et al Nov. 10, 19332,107,773 Axe Feb. 8, 1938 2,181,099 Edwards Sept. 27, 1938 2,135,680Sharp Nov. 8, 1938 2,144,782 Swanson Jan. 24, 1939 2,153,218 VerhagenApr. 4, 1939 2,270,348 Rurnney Jan. 20, 1942 2,283,009 Levan May 12,1942 FOREGN PATENTS Number Country Date 391,633 Great Britain May 4,1933

